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Colloido-chemical characteristics of porous glasses with different compositions in KNO3 solutions. 1. Structural and electrokinetic characteristics of membranes

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Abstract

The structural (specific surface area, liquid-filtration coefficient, average pore radius, volume porosity, and structural-resistance coefficient) and electrokinetic (counterion transport numbers, specific electrical conductivity, and electrokinetic potential) characteristics of porous glasses with different compositions have been determined in potassium nitrate solutions with concentrations of 10−3–10−1 M. All the membranes under investigation have been shown to exhibit the dependences of efficiency coefficients and counterion transport numbers on electrolyte concentration and pore size that are predicted by the theory of an electrical double layer. It has been established that, at a constant electrolyte concentration, the absolute values of electrokinetic potential increase with the average pore radius because of variations in the slipping-plane position.

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Authors and Affiliations

  1. Department of Chemistry, St. Petersburg State University, Universitetskii pr. 26, Petrodvorets, St. Petersburg, 198504, Russia

    L. E. Ermakova, A. V. Volkova & F. G. Murtuzalieva

  2. Grebenshchikov Institute of Silicate Chemistry, Russian Academy of Sciences, nab. Makarova 2, St. Petersburg, 199034, Russia

    T. V. Antropova

Authors
  1. L. E. Ermakova
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  2. A. V. Volkova
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  3. T. V. Antropova
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  4. F. G. Murtuzalieva
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Correspondence to L. E. Ermakova.

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Original Russian Text © L.E. Ermakova, A.V. Volkova, T.V. Antropova, F.G. Murtuzalieva, 2014, published in Kolloidnyi Zhurnal, 2014, Vol. 76, No. 5, pp. 594–600.

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Ermakova, L.E., Volkova, A.V., Antropova, T.V. et al. Colloido-chemical characteristics of porous glasses with different compositions in KNO3 solutions. 1. Structural and electrokinetic characteristics of membranes. Colloid J 76, 546–552 (2014). https://doi.org/10.1134/S1061933X1405007X

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  • DOI: https://doi.org/10.1134/S1061933X1405007X

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